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scsi: fnic: Avoid sending reset to firmware when another reset is in progress

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[ Upstream commit 9698b6f473555a722bf81a3371998427d5d27bde ]

This fix is to avoid calling fnic_fw_reset_handler through
fnic_host_reset when a finc reset is alreay in progress.

Signed-off-by: Satish Kharat <satishkh@cisco.com>
Signed-off-by: Sesidhar Baddela <sebaddel@cisco.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Satish Kharat 2016-12-14 13:20:41 -08:00 • committed by Greg Kroah-Hartman
parent 0866aed4fa
commit 27eb77b554
2 changed files with 17 additions and 0 deletions
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1
drivers/scsi/fnic/fnic.h
View file

@ -248,6 +248,7 @@ struct fnic {
struct completion *remove_wait; /* device remove thread blocks */
atomic_t in_flight; /* io counter */
bool internal_reset_inprogress;
u32 _reserved; /* fill hole */
unsigned long state_flags; /* protected by host lock */
enum fnic_state state;

16
drivers/scsi/fnic/fnic_scsi.c
View file

@ -2533,6 +2533,19 @@ int fnic_host_reset(struct scsi_cmnd *sc)
unsigned long wait_host_tmo;
struct Scsi_Host *shost = sc->device->host;
struct fc_lport *lp = shost_priv(shost);
struct fnic *fnic = lport_priv(lp);
unsigned long flags;
spin_lock_irqsave(&fnic->fnic_lock, flags);
if (fnic->internal_reset_inprogress == 0) {
fnic->internal_reset_inprogress = 1;
} else {
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
"host reset in progress skipping another host reset\n");
return SUCCESS;
}
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
/*
* If fnic_reset is successful, wait for fabric login to complete
@ -2553,6 +2566,9 @@ int fnic_host_reset(struct scsi_cmnd *sc)
}
}
spin_lock_irqsave(&fnic->fnic_lock, flags);
fnic->internal_reset_inprogress = 0;
spin_unlock_irqrestore(&fnic->fnic_lock, flags);
return ret;
}